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Highly efficient pH-universal hydrogen evolution reaction catalyzed by rapidly reconstructed bimetallic cobalt-molybdenum alloy cuboids arrays

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Nano Research 2024年第8期17卷 6977-6983页

作者： Daolian Liu Zihao Wang Yan Zhang haiqing zhou Yong Zhang Dongyang Li Fang Yu Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan ProvinceDepartment of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China State Key Laboratory of Marine Resource Utilization in South China Sea and Department of Materials Science and EngineeringHainan UniversityHaikou 570228China Institute of Interdisciplinary Studies Hunan Normal UniversityChangsha 410081China

Given the inherent potential of seawater,industrial wastewater,and residential water as inherent feedstocks for hydrogen production through water electrolysis,there is a critical demand for the exploration of robust and stable hydrogen-evolving catalysts that can operate effectively across a diverse range of pH ***,the pursuit of hydrogen-evolving electrocatalysts that demonstrate both good stability and high efficiency over a wide pH range remains a formidable *** we report the rational design and synthesis of an outstanding nanoporous hybrid electrocatalyst consisting of intermetallic cobalt-molybdenum alloy particles anchoring on MoO2 cuboid arrays,which demands very low overpotentials of 72,123 and 134 mV to deliver a current density of−100 mA·cm^(−2)for hydrogen evolution reaction under alkaline,neutral and acidic conditions,*** catalytic activities are superior to most non-precious-metal-based catalysts documented in the literatures,and are even comparable to noble metal *** particular,this alloy electrocatalyst exhibits excellent stability at 50 or 300 mA·cm^(−2)without obvious activity degradation,which is further supported by the undetectable changes in the surface chemical valence states on the basis of in-situ X-ray photoelectron spectroscopic *** study provides an innovative strategy for the design and synthesis of effective non-noble intermetallic catalysts for pH-universal hydrogen evolution over a wide pH range.

关键词： electrocatalyst hydrogen evolution reaction pH-universal non-noble water splitting

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UPLC-MS/MS同时检测湿米粉(粉条)中脱氢乙酸、米酵菌酸

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食品工业 2024年第4期45卷 304-307页

作者：周海青黄素美河源市疾病预防控制中心河源517000

建立超高效液相色谱-串联质谱法(ultra performance liquid chromatography-tandem mass spectrometry,UPLC-MS/MS)同时检测湿米粉(粉条)中脱氢乙酸、米酵菌酸的方法。样品经0.2%氨水-80%甲醇水溶液提取,上清液过0.22μm微孔滤膜,经Agilent InfinityLab Poroshell 120 EC-C_(18)柱(2.1 mm×50 mm,1.9μm)分离,以5 mmol/L乙酸铵(氨水调节pH 8.0)-甲醇为流动相,采用电喷雾离子源(electrospray ionization,ESI)负离子多反应监测模式检测,外标法定量。结果表明,在优化后的条件下,脱氢乙酸、米酵菌酸分别在1~100 mg/L、1~100μg/L范围内线性关系良好,线性相关系数大于0.999,方法检出限分别为0.092 mg/kg、1.8μg/kg。脱氢乙酸在加标水平分别为4.0,20.0和80.0 mg/kg情况下,回收率为88.0%~99.8%,相对标准偏差(n=6)为1.0%~3.4%。米酵菌酸加标水平分别为8.0,100和240μg/kg情况下,回收率为89.8%~106.1%,相对标准偏差(n=6)为1.4%~2.5%。该方法简便快捷、重复性好、灵敏度高、准确性高,可同时检测湿米粉(粉条)的脱氢乙酸、米酵菌酸。

关键词：超高效液相色谱-串联质谱法脱氢乙酸米酵菌酸湿米粉湿粉条

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多维度护理代际特征问卷的汉化及信效度检验

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中华护理教育 2024年第5期21卷 580-586页

作者：高肖魏丽丽周海清宫慧孙亚茹谷如婷青岛大学附属医院青岛市266000

目的汉化多维度护理代际特征问卷(Multidimensional Nursing Generations Questionnaire,MNGQ),并检验中文版MNGQ信效度。方法取得源问卷开发者授权后,依据Brislin经典模型对MNGQ进行正译、回译,经跨文化调试、预调查,形成中文版MNGQ。2... 详细信息

目的汉化多维度护理代际特征问卷(Multidimensional Nursing Generations Questionnaire,MNGQ),并检验中文版MNGQ信效度。方法取得源问卷开发者授权后,依据Brislin经典模型对MNGQ进行正译、回译,经跨文化调试、预调查,形成中文版MNGQ。2023年1月—3月,采用便利抽样法,选取来自山东省7所三级甲等综合医院的492名临床护士作为调查对象,采用一般资料调查表、中文版MNGQ对其进行调查,并从中便利抽取30名护士,于其初次接受调查2周后,再次对其进行调查,评价中文版MNGQ的信效度。结果中文版MNGQ由代际冲突、患者安全观、代代关系、多代合作、方向改变和工作倾向6个维度组成,共45个条目;问卷的Cronbach’sα系数为0.943,重测信度系数为0.764;条目水平的内容效度指数为0.80~1.00,量表水平的内容效度指数为0.91。经探索性因子分析提取6个公因子,累计方差贡献率为64.977%。验证性因子分析结果显示,χ^(2)/df=2.552,渐进残差均方和平方根(RMSEA)=0.045,标准化均方根残差(SRMR)=0.046,比较拟合指数(CFI)=0.934,非归准适配指数(TLI)=0.929,递增拟合指数(IFI)=0.934。各维度的平均提取方差值(AVE)均>0.500,各维度的组合信度值均>0.700;各维度AVE的平方根值均大于该维度与其他维度间的相关系数。结论中文版MNGQ具有良好的信效度,可作为评估我国工作场所中不同代护士特征的工具。

关键词：代际特征代际差异代际冲突护士问卷信度效度

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In situ electrochemical dehydrogenation of ultrathin Co(OH)_(2) nanosheets for enhanced hydrogen evolution

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Chinese Chemical Letters 2023年第1期34卷 469-473页

作者： Qian zhou Qihang Bian Liling Liao Fang Yu Dongyang Li Dongsheng Tang haiqing zhou Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationKey Laboratory for Matter Microstructure and Function of Hunan ProvinceHunan Normal UniversityChangsha 410081China Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan UniversityChangsha 410082China

Transition metal hydroxides/oxyhydroxides have recently emerged as highly active electrocatalysts for oxygen evolution reaction in alkaline water electrolysis,while have not yet been widely investigated for hydrogen evolution electrocatalysts owing to their unfavorable H*-adsorption,making it difficult to construct an overall-water-splitting cell for hydrogen *** this work,we proposed a straightforward and effective approach to develop an efficient in-plane heterostructured CoOOH/Co(OH)_(2) catalyst via in-situ electrochemical dehydrogenation method,in which the dehydrogenated–CoOOH and Co(OH)_(2) at the surface synergistically boost the hydrogen evolution reaction(HER)kinetics in base as confirmed by high-resolution transmission electron microscope,synchrotron X-ray absorption spectroscopy,and electron energy loss *** to the in-situ dehydrogenation of ultrathin Co(OH)_(2) nanosheets,the catalytic activity of the CoOOH/Co(OH)_(2) heterostructures is progressively improved,which exhibit outstanding hydrogen-evolving activity in base requiring a low overpotential of 132 m V to afford 10 m A/cm^(2)with very fast reaction kinetics after 60 h *** gradually improved catalytic performance for the CoOOH/Co(OH)2is probably due to the enhanced H*-adsorption induced by the synergistic effect of heterostructures and better conductivity of Co OOH relative to electrically insulating Co(OH)_(2).This work will open the opportunity for a new family of transition metal hydroxides/oxyhydroxides as active HER catalysts,and also highlight the importance of using in situ techniques to construct precious metal-free efficient catalysts for alkaline hydrogen evolution.

关键词： Hydrogen evolution reaction Transition metal hydroxide In-situ electrochemical dehydrogenation In-plane heterostructure Water splitting

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Studies on the properties of surface and edges of N-layer graphenes

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Science China(Physics,Mechanics & Astronomy) 2011年第10期54卷 1729-1738页

作者： CHEN MinJiang zhou haiqing QIU CaiYu YANG HuaiChao YU Fang SUN LianFeng National Center for Nanoscience and Technology Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Tsinghua University Beijing 100084 China peking University Beijing 100871 China

Graphene, a new two-dimensional carbon material, is a rising star of physics, chemistry and materials science. In this work, we report the recent experimental researches on the Raman spectra and the temperature-dependent features of graphenes and car- bon nanoscrolls, which are evolved from graphene and have an open tubular structure. The layer-dependent Raman enhancing characteristics of n-layer graphenes for crystal violet, and the thickness-dependent morphologies of gold on n-layer graphenes are also systematically investigated. Meanwhile, the aggregations of ferromagnetic and paramagnetic atoms at edges of gra- phenes and graphite are observed and the mechanisms are discussed.

关键词： N-layer graphene Raman spectroscopy edge ferromagnetism

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Boosting pH-Universal Hydrogen Evolution of Molybdenum Disulfide Particles by Interfacial Engineering

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Chinese Journal of Chemistry 2021年第2期39卷 288-294页

作者： Liling Liao Lun Yang Gang Zhao haiqing zhou Fengming Cai Yi Li Xiuzhang Wang Fang Yu Synergetic Innovation Center for Quantum Effects and Applications Key Laboratory for Matter Microstructure and Function of Hunan ProvinceKey Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of EducationSchool of Physics and ElectronicsHunan Normal UniversityChangshaHunan410081 China Institute for Advanced Materials Hubei Normal UniversityHuangshiHubei435002 China Nanotechnology&Application Center Ningbo Fengcheng Advanced Energy Materials Research InstituteNingboZhejiang315500 China

The design of high-efficiency non-noble and earth-abundant electrocatalysts for hydrogen evolution reaction(HER)is highly paramount for water splitting and renewable energy *** disulfide(MoS_(2))with abundant edge sites can be utilized as a promising alternative,but its catalytic activity is greatly related to the pH values,especially in an alkaline environment due to the extremely high energy barriers for water adsorption and dissociation *** we report an exceptionally efficient and stable electrocatalyst to improve the sluggish HER process of layered MoS_(2)particles in different pH electrolytes,especially in *** electrocatalyst is constructed by in situ growing selenium-doped MoS_(2)(Se-MoS_(2))nanoparticles on three-dimensional cobalt nickel diselenide(mCo_(0.2)Ni_(0.8)Se_(2))nanostructured *** to the large number of active edge sites of Se-MoS_(2)particles exposed at the surface,robust electrical conductivity and large surface area of mCo_(0.2)Ni_(0.8)Se_(2)support,and strong interfacial interactions between Se-MoS_(2)and mCo_(0.2)Ni_(0.8)Se_(2),this hybrid catalyst shows very outstanding catalytic HER properties featured by low overpotentials of 30 and 122 mV at 10 and 100 mA/cm^(2)with good operational stability in base,respectively,which outperforms most of inexpensive catalysts consisting of layered MoS_(2),transition metal selenides and sulfides,and it performs as well as noble Pt ***,this electrocatalyst is also very active in neutral and acidic electrolytes,requiring low overpotentials of 93 and 94 mV at 10 mA/cm^(2),respectively,demonstrating its superb pH universality as a HER electrocatalyst with excellent catalytic *** study provides a straightforward strategy to construct an efficient non-noble electrocatalyst for driving the HER kinetics in different electrolytes.

关键词： Hydrogen evolution reaction Molybdenum disulfide pH-universal Water splitting Heterogeneous catalysis

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基于社会网络的建筑行业科技创新主体合作网络演化研究——以“华夏建设科学技术奖”为例

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科技和产业 2024年第4期24卷 93-100页

作者：薛寒郑志哲周海青赵霞苏义坤东北林业大学土木与交通学院哈尔滨150040 中建八局第一建设有限公司济南250014 住房和城乡建设部标准定额研究所北京100835

对创新主体合作情况进行研究,探究建筑行业创新主体合作现状和演化趋势。根据2007—2021年“华夏建设科学技术奖”获奖情况,以社会网络分析的视角对创新主体合作整体、个体网络及演化特征进行分析。结果表明,创新主体多通过跨类型机构... 详细信息

对创新主体合作情况进行研究,探究建筑行业创新主体合作现状和演化趋势。根据2007—2021年“华夏建设科学技术奖”获奖情况,以社会网络分析的视角对创新主体合作整体、个体网络及演化特征进行分析。结果表明,创新主体多通过跨类型机构合作方式推进建筑科技创新,“校—企”合作是当前的主要合作模式;合作网络规模不断扩展,创新主体逐渐向一个联通子图聚集,形成具有紧密关系的“小世界”;以同济大学、清华大学为代表的创新主体处于合作网络核心位置,促进边缘主体的建设科技创新合作。

关键词：华夏建设奖创新主体合作网络社会网络分析

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Novel Method for Evaluating the Aging of Aviation Turbine Engine Oils via High-Temperature Bearing Deposit Tests

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China Petroleum Processing & Petrochemical Technology 2024年第1期26卷 67-77页

作者： Hao Lichun Yang He Song haiqing zhou Yunfan He Jingjian Liang Yuxiang SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083

Aviation turbine engine oils require excellent thermal-oxidative stability because of their high-temperature ***-temperature bearing deposit testing is a mandatory method for measuring the thermal-oxidative performance of aviation lubricant oils,and the relevant apparatus was improved in the present *** different commercial aviation turbine engine oils were tested,one with standard performance(known as the SL oil)and the other with high thermal stability,and their thermal-oxidative stability characteristics were *** 100 h of high-temperature bearing testing,the SL oil was analyzed by using various analytical techniques to investigate its thermal-oxidative process in the bearing test,with its thermal-oxidative degradation mechanism also being *** results indicate that the developed high-temperature bearing apparatus easily meets the test requirements of method 3410.1 in standard *** viscosity and total acid number(TAN)of the SL oil increased with the bearing test time,and various deposits were produced in the bearing test,with the micro-particles of the carbon deposits being sphere-like,rod-like,and sheet-like in *** antioxidant additives in the oil were consumed very rapidly in the first 30 h of the bearing test,with N-phenyl-1-naphthylamine being consumed faster than ***,the oil thermal-oxidative process involves very complex physical and chemical mechanisms.

关键词： aviation turbine engine oil high-temperature bearing deposit test thermal-oxidative degradation antioxidant additives

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Bi_2Se_3/C Nanocomposite as a New Sodium-Ion Battery Anode Material

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Nano-Micro Letters 2018年第3期10卷 135-143页

作者： Lixin Xie Ze Yang Jingying Sun haiqing zhou Xiaowei Chi Hailong Chen ANDy X.Li Yan Yao Shuo Chen Department of Physics and TcSUH University of Houston Department of Electrical and Computer Engineering and Materials Science and Engineering Program University of Houston The Woodruff School of Mechanical Engineering Georgia Institute of Technology Clements High School

Bi_2Se_3 was studied as a novel sodium-ion battery anode material because of its high theoretical capacity and high intrinsic conductivity. Integrated with carbon,Bi_2Se_3/C composite shows excellent cyclic performance and rate capability. For instance, the Bi_2Se_3/C anode delivers an initial capacity of 527 mAh g^(-10) at 0.1 A g^(-1) and maintains 89% of this capacity over 100 cycles. The phase change and sodium storage mechanism are also carefully investigated.

关键词： Bi2Se3 Sodium-ion battery High-energy ball milling Sodium storage mechanism

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连翘酯苷A负调控HMGB1的表达抑制bEECs炎性损伤作用研究

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塔里木大学学报 2024年第1期36卷 22-27页

作者：苏朵朵马蓓丁泽周海青张佳妮山丽娜刘俊峰塔里木大学动物科学与技术学院新疆阿拉尔843300 新疆生产建设兵团塔里木动物疫病诊断与防控工程实验室新疆阿拉尔843300

奶牛子宫内膜炎是造成乳品行业巨大经济损失的主要疾病之一,从传统中草药连翘中提取的连翘酯苷A具有广泛的生物活性。本研究旨在阐明连翘酯苷A对大肠杆菌内毒素(LPS)介导的奶牛子宫内膜上皮细胞(bEECs)炎性损伤的抑制作用,并在体外阐明... 详细信息

奶牛子宫内膜炎是造成乳品行业巨大经济损失的主要疾病之一,从传统中草药连翘中提取的连翘酯苷A具有广泛的生物活性。本研究旨在阐明连翘酯苷A对大肠杆菌内毒素(LPS)介导的奶牛子宫内膜上皮细胞(bEECs)炎性损伤的抑制作用,并在体外阐明其可能的分子机制。研究结果表明,在LPS诱导的bEECs炎性损伤模型中,连翘酯苷A显著抑制了bEECs的损伤作用;qPCR结果表明,连翘酯苷A能显著抑制促炎细胞因子(TNF-α、IL-6和IL-1β)的释放,并具有剂量依赖性;免疫荧光与免疫印迹结果证实,连翘酯苷A显著抑制高迁移率蛋白1(HMGB1)的表达,进而阻遏p65蛋白的磷酸化。本研究表明,连翘酯苷A通过负调控HMGB1的表达,介导NF-κB信号通路对LPS诱导的bEECs炎性损伤具有保护作用。

关键词：连翘酯苷A 子宫内膜上皮细胞高迁移率蛋白1 炎性损伤

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